Design of the Next Generation Antenna Mounts

2015 ◽  
Author(s):  
Ruben Gregory Puthota Dominic Savio ◽  
Betsegaw Gebrehiwot ◽  
Dereje Agonafer ◽  
Al Skrepcinski ◽  
Tom Palmer
Keyword(s):  
High Load ◽  
Wind Pressure ◽  
Frame Structure ◽  
Load Carrying Capacity ◽  
Projected Area ◽  
Dead Weight ◽  
Load Carrying ◽  
Preliminary Stress ◽  
Stress And Deformation ◽  
Future Work

Design of new antenna mount with low effective projected area (EPA) and high load carrying capacity for telecommunication towers is discussed in this paper. The main aim is to reduce the EPA of the mount against the wind pressure direction at the desired elevation from ground by reducing the mount frame structure parts compared to the previous mount designs used in the market. The model in itself has to withstand its dead weight, operator’s weight along with five antenna-radio units. The new model has been designed with a single horizontal frame and four supporting structure for EPA reduction and also the EPA is calculated through Image Processing using MATLAB tool which has not been done previously for mounting structures in the telecommunication field. The preliminary stress and deformation results calculated using ANSYS 15.0 tool and future work that has to be carried out for the design are also discussed in this paper.

Ga-based liquid metal with good self-lubricity and high load-carrying capacity

2019 ◽  
Vol 129 ◽  
pp. 1-4 ◽  
Author(s):  
Jun Cheng ◽  
Yuan Yu ◽  
Jie Guo ◽  
Shuai Wang ◽  
Shengyu Zhu ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Carrying Capacity ◽  
High Load ◽  
Load Carrying Capacity ◽  
Load Carrying

A novel prosthetic finger design with high load-carrying capacity

2021 ◽  
Vol 156 ◽  
pp. 104121
Author(s):  
S. Liu ◽  
M. Van ◽  
Z. Chen ◽  
J. Angeles ◽  
C. Chen
Keyword(s):  
Carrying Capacity ◽  
High Load ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Prosthetic Finger

NDE Inspections and Simulation of Defects in Composite-Sintered Bushes

2013 ◽  
Vol 650 ◽  
pp. 582-587
Author(s):  
Kwang Hee Im ◽  
Ki Youl Kim ◽  
Ki Taek Shin ◽  
Han Hee Lee ◽  
To Kang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Carrying Capacity ◽  
Diffusion Bonding ◽  
Manufacturing Process ◽  
High Load ◽  
Load Carrying Capacity ◽  
Heavy Duty ◽  
Temperature Diffusion ◽  
Load Carrying

Bush is one of machine and automobile parts like brake used in drums and hubs in particular. Such bush parts are used for bearings of heavy-duty, large cars requiring wear resistance and high load carrying capacity. High temperature diffusion bonding has been applied for holding the both materials of the bushing together, which are outer steel materials and inner composite-sintered bushings. Therefore, it is very important evaluate the bonding integrity in manufacturing process. A simulation has been performed in order to evaluate the maximum defect sizes. Also, ultrasonic C-scan tests were performed for finding the defect in the composite-sintered bushings with the size of inherent flaws.

Wind System Reliability and Capacity

2014 ◽  
Author(s):  
Alex Pavlak ◽  
Harry V. Winsor
Keyword(s):  
Power Systems ◽  
Carrying Capacity ◽  
System Reliability ◽  
Electric Power Systems ◽  
High Load ◽  
System Capacity ◽  
Wind Generation ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Superior Approach

Capacity measures a system’s ability to survive stress. For example, structures are engineered in part to have the capacity to survive the worst wind loads expected over the life of the structure. Likewise wind electric power systems should have the capacity to reliably survive the worst combination of high load and low wind. A superior approach for quantifying wind’s contribution to system capacity is well known. It is to view wind as a negative load and use the Effective Load Carrying Capacity (ELCC) methodology for a given year. A frequent mistake is to average these annual ELCC estimates. A main contribution of this paper is to explain why the system design criteria should take the worst of the annual ELCC estimates over a number of years and not an average of annual ELCC estimates. Based on extreme events, wind generation contributes little to system capacity (<6.6% of wind nameplate). The empirical evidence shows that wind generation is an energy source, not a capacity resource.

scholarly journals Increasing the load carrying capacity of highly loaded gears by nitriding

2019 ◽  
Vol 287 ◽  
pp. 02001 ◽  
Author(s):  
Johannes Koenig ◽  
Stefanie Hoja ◽  
Thomas Tobie ◽  
Franz Hoffmann ◽  
Karsten Stahl
Keyword(s):  
Carrying Capacity ◽  
High Sensitivity ◽  
Compound Layer ◽  
High Load ◽  
Load Carrying Capacity ◽  
Stable Compound ◽  
Current State ◽  
Load Carrying ◽  
State Of Research ◽  
Highly Loaded

Nitriding is a common heat treatment process for highly loaded gears. A very hard compound layer with a thickness of a few microns is produced at the surface of the gear. In the underlying material areas, a diffusion layer with nitride precipitations is formed. This publication summarizes the state of knowledge of nitrided gears and gives an overview of the current state of research in the field of nitrided gears. It can be concluded that a high load carrying capacity of nitrided gears is dependent on an adequate NHD and a stable compound layer. However, due to the increased surface roughness after nitriding, the risk of micropitting increases, too. Therefore, it may be favourable to grind the gears after nitriding. Ground gears also can provide a high load carrying capacity, but it must be taken into account that the wear performance will decrease significantly, since it is mainly influenced by the compound layer. In addition, nitrided gears usually show a high sensitivity against local load peaks. Beyond creating a stable compound the layer, the realization of a sufficient nitriding hardness depth with larger gear sizes is a focus in the current field of research.

scholarly journals Design and Prototyping of a Partially Decoupled 4-DOF 3T1R Parallel Manipulator With High-Load Carrying Capacity

2008 ◽  
Vol 130 (12) ◽  
Author(s):  
Sébastien Briot ◽  
Vigen Arakelian ◽  
Sylvain Guégan
Keyword(s):  
Carrying Capacity ◽  
Horizontal Plane ◽  
Parallel Manipulator ◽  
Degrees Of Freedom ◽  
Experimental Validation ◽  
Vertical Axis ◽  
High Load ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Fixed Orientation

In this paper, a new four degrees of freedom 3T1R parallel manipulator with high-load carrying capacity is presented. This manipulator generates Schönflies motions, in which the moving platform carries out three independent translations and one rotation about one axis of fixed orientation. The particularity of the proposed architecture is the decoupling of the displacements of the platform in the horizontal plane from the platform’s translation along the vertical axis. Such a decoupling allows the cancellation of the gravity loads on the actuators, which displace the platform in the horizontal plane. A prototype of the proposed manipulator with four degrees of freedom and an experimental validation of the suggested concept are also presented. Two cases have been examined on the built prototype: a manipulator with payload and one without. It was shown that the input torques of actuators displacing the platform in the horizontal plane for these two cases are the same; i.e., the payload does not bring any load to the actuators.

Uniform Loading Analysis for Pin-Hole-Output Mechanism of FA Cycloid Drive

2012 ◽  
Vol 479-481 ◽  
pp. 925-931
Author(s):  
Lei Lei ◽  
Ying Tao ◽  
Tian Min Guan
Keyword(s):  
Carrying Capacity ◽  
Bending Strength ◽  
Deformation Analysis ◽  
Load Carrying Capacity ◽  
Bending Stress ◽  
Uniform Loading ◽  
Force Loading ◽  
Load Carrying ◽  
Stress And Deformation ◽  
Loading Analysis

In order to balance the force loading on the dowel pin , improve the load carrying capacity on pin-hole type output mechanism the FA cycloid drive, we considered to add uniform loading ring on the cantilever end of the pins in this paper. Under the action of uniform loading ring, we did the stress and deformation analysis on the dowel pin; Through the examples comparison we found that, the maximum bending stress of the dowel pin is reduced by 77.86% after adding the uniform loading ring, the dowel pin stress is well-distributed, and the bending strength of output mechanism is improved, thus the load carrying capacity of overall unit is improved.

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